<template>
    <div>
        <div class="search">
            <input
                v-model="keyword" 
                class="search-input"
                type="text"
                placeholder="输入城市名或拼音" />
        </div>
        <div 
            class="search-content"
            ref="search"
            v-show="keyword"
        >
            <ul>
                <li 
                    class="search-item"
                    v-for="item of list"
                    :key="item.id"
                    @click="handleCityClick(item.name)"
                >
                    {{item.name}}
                </li>
                <li
                    class="search-item border-bottom"
                    v-show="hasNoData"    
                >
                    没有找到匹配内容
                </li>
            </ul>  
        </div>
    </div>
</template>
<script>
import Bscroll from 'better-scroll';
import { mapMutations } from 'vuex';
export default {
    name: 'CitySearch',
    data() {
        return {
            keyword: '',
            list: [],
            timer: null
        }
    },
    props: {
        cities: Object
    },
    methods: {
        handleCityClick(city) {
            this.changeCity(city);
            this.$router.push('/');
        },
        ...mapMutations(['changeCity'])
    },
    watch: {
        keyword () {
            if (this.timer) {
                clearTimeout(this.timer);
            }
            if (!this.keyword) {
                this.list = [];
                return;
            }
            this.timer = setTimeout(() => {
                const result = [];
                for (let i in this.cities) {
                    this.cities[i].forEach(value => {
                        if (value.spell.indexOf(this.keyword) > -1 || 
                            value.name.indexOf(this.keyword) > -1) {
                            result.push(value);
                        }
                    })
                }
                this.list = result;
            }, 100)
        }
    },
    mounted () {
        this.scroll = new Bscroll(this.$refs.search);
    },
    computed: {
        hasNoData () {
            return !this.list.length;
        }
    }
}
</script>
<style lang="stylus" scoped>
@import '~styles/varibles.styl'
.search 
    height: .72rem
    padding: 0 .1rem
    background: $bgcolor
    font-size: 0
    &-input
        width: 100%
        height: .62rem
        line-height: .42rem
        padding: .1rem
        text-align: center
        box-sizing: border-box
        color: #666
        font-size: .24rem
        border-radius: .06rem
        caret-color: #666 // 调整光标颜色
    &-content
        overflow: hidden
        position absolute
        top: 1.58rem
        right: 0
        bottom: 0
        left: 0
        background: #eee 
        z-index: 1
    &-item
        font-size: .28rem
        line-height: .62rem
        padding-left: .2rem
        color: #666
        background: #fff
</style>


